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Jeff Aluotto asks for data about converting from weekly to bi-weekly collection. The most best and most recent data which I have seen on the subject was compiled statististically from the Seattle region by Sound Resources, Single-Family Residential Solid Waste Collection Practices in King County: Collection Program Characteristics and Best Practices for Waste Minimization and Diversion Maximization (December 2003). That study found that bi-weekly programs collected 239 fewer pounds per household per year than traditional weekly programs (see Table 1 on page 34). This compares, of course, to typical base level recycle collections that are usually not more than 500 lbs./HH/yr. Although this average impact would seem to suggest a very substantial proportion of current diversion from such a shift could be lost, I would want to emphasize that this tendency does not mean that bi-weekly collection cannot work anywhere. There certainly are instances where it is has. But, the answer to your question for any particular town is local-dependent and not answerable from someone else's study done elsewhere. I understand that Waste Management is aggressively marketing bi-weekly collection, as a component of single stream collection, in many markets, without any site specific analysis to confirm that the typical diversion losses will not occur there. What the Sound Resource Study does tell us that is that the underdesirable consequences are so significant, the only prudent course would be to field test the change in a typical neighborhood before proceeding to adopt it. If you need help in formulating a study design to do that, just let me know. (You can get a copy of Jeff Morris' excellent study from his Sound Resources web site, www.zerowaste.com, or I can send you a PDF copy if that would be simpler for you.) Peter _________________________ Peter Anderson, President RECYCLEWORLDS CONSULTING 4513 Vernon Blvd. Suite 15 Madison, WI 53705-4964 Ph: (608) 231-1100 Fax: (608) 233-0011 Cell: (608) 698-1314 eMail: anderson@no.address web: www.recycleworlds.net CONFIDENTIAL This message, and all attachments thereto, is covered by the Electronic Communications Privacy Act, 18 U.S.C., Sections 2510-2521. This message is CONFIDENTIAL. If you are not the intended recipient of this message, then any retention, dissemination, distribution or copying of this communication is strictly prohibited. Please notify me if you received this message in error at anderson@no.address and then delete it. |
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